The Regex form could not be mutated on the verification path (the mutant runner collapsed its backslashes), and a
character loop with named length constants states the same rule without the dependency. Adds refusals for a capital
inside a name, a hyphen, and a direct empty-name case. Builds (not yet run when committed).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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